[All hosts] (UI/UX) Update title for better SEO and discoverability (#5234)

* Update title

Reduce "that" usage

* Update toc.yml

Author: lindalu-MSFT

docs/design/voice-guidelines.md

@@ -1,16 +1,16 @@
 ---
-title: Voice and tone guidelines for Office Add-ins
+title: Writing and style guidelines for Office Add-ins
 description: Learn best practices in writing user help and other text for Office Add-ins.
-ms.date: 05/18/2023
+ms.date: 06/16/2025
 ms.topic: best-practice
 ms.localizationpriority: medium
 ---
 
-# Voice and tone guidelines
+# Writing and style guidelines
 
-As you design your Office Add-ins, consider the voice that you use in your UI text and elements. Strive to match the voice and tone of the Office UI, which is conversational, engaging, and accessible to users.
+As you design your Office Add-ins, consider the voice you use in your UI text and elements. Strive to match the voice and tone of the Office UI, which is conversational, engaging, and accessible to users.
 
-- **Use a natural style.** Write the way that you speak. Avoid jargon and overly technical words and phrases. Use terms that are familiar to your users.
+- **Use a natural style.** Write the way you speak. Avoid jargon and overly technical words and phrases. Use terms that are familiar to your users.
 - **Use simple, direct language.** Use short words and sentences, and active voice in your text.
 - **Be consistent.** Use the same words for the same concepts throughout.
 - **Engage the user.** Address the user as "you". Avoid using third person. Use imperatives for user tasks.

docs/toc.yml

@@ -201,7 +201,7 @@ items:
           href: design/accessibility-guidelines.md
         - name: Data visualization
           href: design/data-visualization-guidelines.md
-        - name: Voice and tone
+        - name: Writing and style
           href: design/voice-guidelines.md
       - name: UX design language and patterns
         items: